HOMEVULNERABILITIESCVE-2021-22883
HIGH

CVE-2021-22883

CWE-400Published: March 3, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an 'unknownProtocol' are established. This leads to a leak of file descriptors. If a file descriptor limit is configured on the system, then the server is unable to accept new connections and prevent the process also from opening, e.g. a file. If no file descriptor limit is configured, then this lead to an excessive memory usage and cause the system to run out of memory.

NVD Source

Technical Analysis

CVE-2021-22883 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Fedora1 product(s)
fedora
netapp1 product(s)
e-series performance analyzer
Node.js1 product(s)
node.js
Oracle5 product(s)
graalvmjd edwards enterpriseone toolsmysql clusternosql databasepeoplesoft enterprise peopletools
siemens1 product(s)
sinec infrastructure network services
Source: NVD CPE · 14 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
PATCHhttps://nodejs.org/en/blog/vulnerability/february-2021-security-releases/
PATCHhttps://www.oracle.com//security-alerts/cpujul2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuApr2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html
PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
PATCHhttps://nodejs.org/en/blog/vulnerability/february-2021-security-releases/
PATCHhttps://www.oracle.com//security-alerts/cpujul2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuApr2021.html
PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html
ADVISORYhttps://hackerone.com/reports/1043360
ADVISORYhttps://security.netapp.com/advisory/ntap-20210416-0001/
ADVISORYhttps://hackerone.com/reports/1043360
ADVISORYhttps://security.netapp.com/advisory/ntap-20210416-0001/

All References (20)

→
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch · Third Party Advisory
→
https://hackerone.com/reports/1043360Permissions Required · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E4FRS5ZVK4ZQ7XIJQNGIKUXG2DJFHLO7/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F45Y7TXSU33MTKB6AGL2Q5V5ZOCNPKOG/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSYFUGKFUSZ27M5TEZ3FKILWTWFJTFAZ/
→
https://nodejs.org/en/blog/vulnerability/february-2021-security-releases/Patch · Release Notes · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210416-0001/Third Party Advisory
→
https://www.oracle.com//security-alerts/cpujul2021.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch · Third Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch · Third Party Advisory
→
https://hackerone.com/reports/1043360Permissions Required · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E4FRS5ZVK4ZQ7XIJQNGIKUXG2DJFHLO7/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F45Y7TXSU33MTKB6AGL2Q5V5ZOCNPKOG/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSYFUGKFUSZ27M5TEZ3FKILWTWFJTFAZ/

Quick Facts

CVE IDCVE-2021-22883
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
Affected5 vendor(s)
PublishedMar 3, 2021

Related CVEs (CWE-400)

CVE-2015-4412
9.8
CVE-2026-30141
9.8
CVE-2025-43193
9.8
CVE-2023-28507
9.8
CVE-2013-20004
9.8
CVE-2018-16486
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-22883 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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